/*
 * Copyright 2009 Jesse McLaughlin (nzjess@gmail.com)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *         http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.travelfusion.xmlclient.ri.handler.misc;

import java.util.ArrayList;

import javax.xml.stream.XMLStreamConstants;

import org.travelfusion.xmlclient.handler.HandlesRequestsFor;
import org.travelfusion.xmlclient.impl.handler.AbstractXmlToolRequestStAXResponseHandler;
import org.travelfusion.xmlclient.ri.xobject.misc.XCity;
import org.travelfusion.xmlclient.ri.xobject.misc.XCountry;
import org.travelfusion.xmlclient.ri.xobject.misc.XGetCitiesPageInfoRequest;
import org.travelfusion.xmlclient.ri.xobject.misc.XGetCitiesPageInfoResponse;

/**
 * @author Jesse McLaughlin (nzjess@gmail.com)
 */
@HandlesRequestsFor(XGetCitiesPageInfoRequest.class)
public class GetCitiesPageInfoHandler extends
    AbstractXmlToolRequestStAXResponseHandler<XGetCitiesPageInfoRequest, XGetCitiesPageInfoResponse> {

  @Override
  protected void fillTemplate() throws Exception {
  // nop
  }

  public XGetCitiesPageInfoResponse handleResponse() throws Exception {
    XGetCitiesPageInfoResponse response = new XGetCitiesPageInfoResponse();
    response.setCities(new ArrayList<XCity>());

    XCity city = null;
    XCountry country = null;
    String currentName = null;
    StringBuilder builder = new StringBuilder(32);

    for (int event; ((event = responseReader.next()) != XMLStreamConstants.END_DOCUMENT);) {
      switch (event) {
        case XMLStreamConstants.START_ELEMENT:
          currentName = responseReader.getName().getLocalPart();
          if (city == null) {
            if ("City".equals(currentName)) {
              city = new XCity();
            }
          }
          else {
            if ("Country".equals(currentName)) {
              country = new XCountry();
            }
          }
          break;
        case XMLStreamConstants.CHARACTERS:
          if (city != null) {
            builder.append(responseReader.getTextCharacters(), responseReader.getTextStart(), responseReader.getTextLength());
          }
          break;
        case XMLStreamConstants.END_ELEMENT:
          if (city != null) {
            currentName = responseReader.getName().getLocalPart();
            if (country != null) {
              if ("Name".equals(currentName)) {
                country.setName(builder.toString().trim());
              }
              else if ("Code".equals(currentName)) {
                country.setCode(builder.toString().trim());
              }
              else if ("Country".equals(currentName)) {
                city.setCountry(new XCountry());
                city.getCountry().setName(country.getName());
                city.getCountry().setCode(country.getCode());
                country = null;
              }
            }
            else {
              if ("Name".equals(currentName)) {
                city.setName(builder.toString().trim());
              }
              else if ("Code".equals(currentName)) {
                city.setCode(builder.toString().trim());
              }
              else if ("City".equals(currentName)) {
                response.getCities().add(city);
                city = null;
              }
            }
            builder.setLength(0);
          }
          currentName = null;
          break;
      }
    }

    return response;
  }
}
